head to head · open source
monaco-editor vs extism
monaco-editor has 46,766 GitHub stars, 4,131 forks, 859 open issues and last shipped 5 days ago. extism has 5,764 stars, 168 forks, 54 open issues and last shipped 16 days ago. monaco-editor leads on adoption by 711% (46,766 vs 5,764 stars). monaco-editor is written in JavaScript under MIT; extism is written in Rust under BSD-3-Clause. monaco-editor has attracted 9% as many forks as stars, extism 3%. monaco-editor was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (browser), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| monaco-editor | extism | |
|---|---|---|
| GitHub stars | ★ 47K | ★ 5.8K |
| License | MIT | BSD-3-Clause |
| Written in | JavaScript | Rust |
| Last push | 2026-09-13 | 2026-09-02 |
| Forks | ⑂ 4.1K | ⑂ 168 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick monaco-editor if
- You weight community size — 47K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick extism if
- You want the extism feature set and don't need the biggest community
- You prefer the BSD-3-Clause license terms
- Your stack matches Rust
- You evaluated both and extism fits your workflow better
About monaco-editor
Monaco Editor is the fully featured code editor from VS Code, packaged as an npm library so that developers can embed the same editing experience inside their own browser based applications.
read the full monaco-editor overview →
About extism
Extism is a lightweight, BSD 3 Clause licensed framework for running WebAssembly (Wasm) inside your own application, aimed at developers who want to make software extensible with untrusted, user supplied plug in code across servers, the edge, CLIs, IoT devices, and browsers.
read the full extism overview →
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Frequently asked questions
Is monaco-editor or extism more popular?
monaco-editor has 46,766 GitHub stars and extism has 5,764. monaco-editor has the larger community by that measure.
Are monaco-editor and extism free?
Both are open source. monaco-editor is licensed under MIT and extism under BSD-3-Clause. Neither carries a licence fee.
What is the difference between monaco-editor and extism?
monaco-editor is written in JavaScript and extism in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, monaco-editor or extism?
Choose monaco-editor if you want the larger community (46,766 stars) or its MIT licence terms. Choose extism if its feature set, stack or BSD-3-Clause licence fits better. Both are self-hostable.